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Transmit Diversity in the WCDMA System
International Journal of Wireless Information Networks, 1999This document presents the transmit diversityconcept adopted for the FDD mode of the thirdgenerationWCDMA system in ETSI in 1998. The open-loop mode isbased on the space-time block code attaining full diversity order with two transmit antennas.Different feedback modes are specified.
Risto Wichman, Ari Hottinen
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IEEE Transactions on Wireless Communications, 2023
Multiple-input multiple-output (MIMO) system has been the defining mobile communications technology in recent generations. With the ever-increasing demands looming towards the sixth generation (6G), we are in need of additional degrees of freedom that ...
W. New +4 more
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Multiple-input multiple-output (MIMO) system has been the defining mobile communications technology in recent generations. With the ever-increasing demands looming towards the sixth generation (6G), we are in need of additional degrees of freedom that ...
W. New +4 more
semanticscholar +1 more source
Joint predistortion and transmit diversity
Globecom '00 - IEEE. Global Telecommunications Conference. Conference Record (Cat. No.00CH37137), 2002This paper presents a scheme for combining joint predistortion (JP) and transmit diversity (Tx diversity). JP is a new baseband processing technique applicable to TDD modems using combined time and code division multiple access. It eliminates intra cell interference at the base station transmitter, allowing for simple code matched filter detectors at ...
Frank Kowalewski, Peter Mangold
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Enhancing CRDSA With Transmit Power Diversity for Machine-Type Communication
IEEE Transactions on Vehicular Technology, 2018Contention resolution diversity slotted ALOHA (CRDSA) is a promising solution to meet the challenge of designing efficient random access in future wireless networks.
S. A. Alvi +2 more
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Transmit diversity and spatial multiplexing in four-transmit-antenna OFDM
IEEE International Conference on Communications, 2003. ICC '03., 2004This paper studies a practical design for achieving both spatial diversity and spatial multiplexing in an OFDM system with four transmit antennas. In a certain range of spectral efficiency, the proposed hybrid space-time block coding/multiple-input multiple-output (STBC/MIMO) design is found to be a good design choice based on performance and receiver ...
Xiangyang Zhuang +3 more
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Transmit diversity schemes for CDMA-2000
WCNC. 1999 IEEE Wireless Communications and Networking Conference (Cat. No.99TH8466), 2003Transmit diversity offers an advantage in the forward link of the cdma2000 system by balancing the spectrum efficiency in the uplink and downlink. Three schemes for performing transmit diversity are examined in this paper-orthogonal transmit diversity, time switched transmit diversity, and selection transmit diversity for vehicular, indoor-outdoor ...
Dinesh Rajan, Steven D. Gray
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Transmit Diversity Schemes for WCDMA
Wireless Personal Communications, 2003Previous work on transmitter antenna diversity has shown that the use of multiple transmitter antennas at the base station results in improved performance due to increase of diversity (path diversity). This happens with no bandwidth cost, even when the signal quality along several paths is poor, but the receiver estimates the channel with accuracy ...
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Geolocation using transmit and receive diversity
IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2005Geolocation using received signal strength (RSS) has large errors due to multipath fading, since fading results in high variations in RSS. We show how and when spatial diversity combined with channel knowledge at the receiver can be used to combat fading effects to increase accuracy in location estimation.
Pulkit Grover +2 more
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Transmit diversity as a combination of spatial and delay diversity
2000 IEEE Sixth International Symposium on Spread Spectrum Techniques and Applications. ISSTA 2000. Proceedings (Cat. No.00TH8536), 2002We present performance results of some of the algebraic space-time (ST) block codes based on the combination of Hadamard spreading sequences with rotated constellations. Given a vector x in a rotated constellation in dimension n that has full spatial diversity, we spread each component x/sub j/ of x by a different Hadamard sequence of length n and send
M.O. Damen +2 more
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Integration of transmit power control, transmit diversity and receive beamforming
ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240), 2002In this paper an algorithm for joint power control, transmit diversity and receive beamforming is proposed where transmit diversity and receive beamforming weight vectors and downlink power allocations are calculated jointly such that signal to interference ratio at each mobile is above threshold.
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